43 citations · 154 across the 13 of their papers we have counts for
14 papers
Reinforcement learning for spin torque oscillator tasks
Jakub Mojsiejuk, Sławomir Ziętek, Witold Skowroński
We address the problem of automatic synchronisation of the spintronic oscillator (STO) by means of reinforcement learning (RL). A numerical solution of the macrospin Landau-Lifschi…
Study of Spin-Orbit Interactions and Interlayer Ferromagnetic Coupling in Co/Pt/Co Trilayers in Wide Range of Heavy Metal Thickness
Piotr Ogrodnik, Krzysztof Grochot, Łukasz Karwacki +6
The spin-orbit torque, a torque induced by a charge current flowing through the heavy-metal conducting layer with strong spin-orbit interactions, provides an efficient way to contr…
Multi-state MRAM cells for hardware neuromorphic computing
Piotr Rzeszut, Jakub Chęciński, Ireneusz Brzozowski +3
Magnetic tunnel junctions (MTJ) have been successfully applied in various sensing application and digital information storage technologies. Currently, a number of new potential app…
Microwave magnetic field modulation of spin torque oscillator based on perpendicular magnetic tunnel junctions
Witold Skowroński, Jakub Chęciński, Sławomir Ziętek +2
Modulation of a spin-torque oscillator (STO) signal based on a magnetic tunnel junction (MTJ) with perpendicularly magnetized free layer is investigated. Magnetic field inductive l…
Structural, magnetostatic and magnetodynamic studies of Co/Mo-based uncompensated synthetic antiferromagnets
Piotr Ogrodnik, Jarosław Kanak, Maciej Czapkiewicz +7
In this work, we comprehensively investigate and discuss the structural, magnetostatic, dynamic, and magnetoresistive properties of epitaxial Co/Mo superlattices. The magnetization…
Multi-bit MRAM storage cells utilizing serially connected perpendicular magnetic tunnel junctions
Piotr Rzeszut, Witold Skowroński, Sławomir Ziętek +2
Serial connection of multiple memory cells using perpendicular magnetic tunnel junctions (pMTJ) is proposed as a way to increase magnetic random access memory (MRAM) storage densit…
Field-free spin-orbit torque switching in Co/Pt/Co multilayer with mixed magnetic anisotropies
Stanisław Łazarski, Witold Skowroński, Jarosław Kanak +5
Spin-orbit-torque (SOT) induced magnetization switching in Co/Pt/Co trilayer, with two Co layers exhibiting magnetization easy axes orthogonal to each other is investigated. Pt lay…
Characterization of spin wave propagation in (111) YIG thin films with large anisotropy
Adam Krysztofik, Hubert Głowiński, Piotr Kuświk +6
We report on long-range spin wave (SW) propagation in nanometer-thick yttrium iron garnet (YIG) film with an ultralow Gilbert damping. The knowledge of a wavenumber value $|\vec{k}…
Biaxial magnetic field setup for angular magnetic measurements of thin films and spintronic nanodevices
Piotr Rzeszut, Witold Skowroński, Sławomir Ziętek +2
The biaxial magnetic-field setup for angular magnetic measurements of thin film and spintronic devices is designed and presented. The setup allows for application of the in-plane m…
Understanding stability diagram of perpendicular magnetic tunnel junctions
Witold Skowroński, Maiej Czapkiewicz, Sławomir Ziętek +4
Perpendicular magnetic tunnel junctions (MTJ) with a bottom pinned reference layer and a composite free layer (FL) are investigated. Different thicknesses of the FL were tested to…
Electric-field tunable spin waves in PMN-PT/NiFe heterostructure: experiment and micromagnetic simulations
Slawomir Zietek, Jakub Checinski, Marek Frankowski +2
We present a comprehensive theoretical and experimental study of voltage-controlled standing spin waves resonance (SSWR) in PMN-PT/NiFe multiferroic heterostructures patterned into…
Electric-field tunable spin diode FMR in patterned PMN-PT/NiFe structures
Sławomir Ziętek, Piotr Ogrodnik, Witold Skowroński +4
Dynamic properties of NiFe thin films on PMN-PT piezoelectric substrate are investigated using the spin-diode method. Ferromagnetic resonance (FMR) spectra of microstrips with vary…
Temperature dependence of spin-orbit torques in W/CoFeB bilayers
Witold Skowronski, Monika Cecot, Jaroslaw Kanak +7
We report on the temperature and layer thickness variation of spin-orbit torques in perpendicularly magnetized W/CoFeB bilayers. Harmonic Hall voltage measurements reveal dissimila…
Rectification of radio frequency current in giant magnetoresistance spin valve
Sławomir Ziętek, Piotr Ogrodnik, Marek Frankowski +7
We report on a highly efficient spin diode effect in an exchange-biased spin-valve giant magnetoresistance (GMR) strips. In such multilayer structures, symmetry of the current dist…